* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

img {
    width: 200px;
    display: block;
    margin: 50px auto 0px;
    user-select: none;
}

.app {
    width: 600px;
    height: 100px;
    margin: 0px auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app input {
    width: 85%;
    height: 50px;
    border: none;
    outline: none;
    background-color: rgb(233, 233, 233);
    text-indent: 1em;
    font-size: 16px;
    border-radius: 8px 0 0 8px;
}

.app button {
    width: 15%;
    height: 50px;
    border: none;
    background-color: rgb(123, 176, 255);
    color: #fff;
    border-radius: 0 8px 8px 0;
    font-size: 16px;
    transition: all .2s;
    cursor: pointer;
    user-select: none;
}

.app button:hover {
    background-color: rgb(89, 155, 255);
}

@media screen and (max-width: 560px) {
    img {
        width: 120px;
        margin: 80px auto 0px;
    }

    .app {
        width: 90%;
    }

    .app input {
        height: 40px;
    }

    .app button {
        height: 40px;
    }
}